(19)

(11)

EP 2 376 893 A1

(12)

(43) Date of publication: 19.10.2011 Bulletin 2011/42 (21) Application number: 09833793.4 (22) Date of filing: 16.11.2009

(51) International Patent Classification (IPC):  G01N 21/00(2006.01) (86) International application number: PCT/US2009/064513 (87) International publication number: WO 2010/071722 (24.06.2010 Gazette 2010/25)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR (30) Priority: 18.12.2008 US 138889 P (71) Applicant: Exxonmobil Upstream Research Company Houston, TX 77252-2189 (US)	(72) Inventors: SUN, Tao Missouri City TX 77459 (US) LI, Dachang Katy TX 77450 (US) WAGONER, John, Van Houston TX 77025 (US) WU, Xiao-hui Sugar Land TX 77478 (US) (74) Representative: Troch, Geneviève et al ExxonMobil Chemical Europe Inc. I.P. Law Shared Services P.O. Box 105 Hermeslaan 2 1831 Machelen 1831 Machelen (BE)